Here is a 102 KB PDF named for the 2SA1764, placed in the schematic category, though JIS numbering identifies it as a PNP bipolar transistor and the document as its datasheet. The file name carries nothing beyond the part number. Useful details inside should include the package outline, pin functions, maximum ratings and characteristic curves. Check the device marking and footprint on the PCB against the sheet before trusting it for a replacement decision.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)